Unfortunately it is against our Terms and Conditions to own multiple GMG accounts. Doing so may result in one or both of your accounts being banned and games being lost. It is also a cause of most failed payment attempts when trying to purchase.
Please ensure you only have one GMG account active at one time, and please make our customer service team are aware of any secondary accounts you have so that we can take the necessary action. If you find yourself encountering payment problems with multiple accounts, please highlight this in your customer support request so that we can get you buying as soon as possible!